To convert ounces (oz) to millilitres (ml), follow these steps:

1. Understand the Conversion Factor:
   • 1 fluid ounce (oz) is approximately equal to 29.5735 millilitres (ml).
2. Apply the Conversion:
   • Multiply the number of ounces by 29.5735 to get the equivalent volume in millilitres.
3. Example Calculations:
   • To convert 5 oz to ml: 5 oz multiplied by 29.5735 equals 147.8675 ml.
   • To convert 12 oz to ml: 12 oz multiplied by 29.5735 equals 354.882 ml.

This method is useful for converting measurements in recipes, scientific experiments, or any situation where liquid volume conversion is required.